4.18-stable review patch. If anyone has any objections, please let me know.
------------------ From: David Ahern <[email protected]> [ Upstream commit 893626d6a353d1356528f94e081246ecf233d77a ] Link dumps can return results from a target namespace. If the namespace id is invalid, then the dump request should fail if get_target_net fails rather than continuing with a dump of the current namespace. Fixes: 79e1ad148c844 ("rtnetlink: use netnsid to query interface") Signed-off-by: David Ahern <[email protected]> Signed-off-by: David S. Miller <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- net/core/rtnetlink.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) --- a/net/core/rtnetlink.c +++ b/net/core/rtnetlink.c @@ -1848,10 +1848,8 @@ static int rtnl_dump_ifinfo(struct sk_bu if (tb[IFLA_IF_NETNSID]) { netnsid = nla_get_s32(tb[IFLA_IF_NETNSID]); tgt_net = get_target_net(skb->sk, netnsid); - if (IS_ERR(tgt_net)) { - tgt_net = net; - netnsid = -1; - } + if (IS_ERR(tgt_net)) + return PTR_ERR(tgt_net); } if (tb[IFLA_EXT_MASK])
